Economic entomology for the farmer Economic entomology for the farmer and fruit-grower economicentomolo01smit Year: 1906 128 AN ECONOMIC ENTOMOLOGY. for their distribution. As they never come to the surface, so far as we know, they are never winged, and are usually dull white in color, or with a slight tinge of green. The body is covered with a whitish powder and lacks honey-tubes. Fig. 94. Phylloxera vastatrix.—a. unaffected rootlet of grape; b, rootlets with newly-formed galls; c, same, with old and dried-up tissue; dd, groups of the lice on roots and root- lets ; e,/, female pupa, from a
Economic entomology for the farmer Economic entomology for the farmer and fruit-grower economicentomolo01smit Year: 1906 128 AN ECONOMIC ENTOMOLOGY. for their distribution. As they never come to the surface, so far as we know, they are never winged, and are usually dull white in color, or with a slight tinge of green. The body is covered with a whitish powder and lacks honey-tubes. Fig. 94. Phylloxera vastatrix.—a. unaffected rootlet of grape; b, rootlets with newly-formed galls; c, same, with old and dried-up tissue; dd, groups of the lice on roots and root- lets ; e,/, female pupa, from above and below ; g, h, winged females; i, an antenna; J, oviparous wingless female and her eggs; k, root showing location of the eggs. An advance upon those root-living species is found in Phyl- (oxera, which belongs with Chermes in a sub-family, Chermesina,
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